Physical Geography of India
🟢 Lite — Quick Review (1h–1d)
Rapid summary for last-minute revision before your exam.
India’s Physical Geography — Key Facts
Location:
- Latitude: 8°4’N to 37°6’N (near equatorial to temperate)
- Longitude: 68°7’E to 97°25’E
- Area: 3.28 million sq km (7th largest)
- Coastline: 7,516 km (including islands)
Major Physical Divisions:
- Himalayan Mountains (North): 2,400 km, 3 ranges (Greater/Himadri, Lesser/Himachal, Siwaliks/Sub-Himalaya)
- Indo-Gangetic Plain (Central): Alluvial deposits, 3 major rivers (Indus, Ganga, Brahmaputra)
- Peninsular Plateau (South): Old landmass, 2 parts (Central Highlands, Deccan Plateau)
- Thar Desert (West): Hot desert, 4.2 lakh sq km
- Coastal Plains (East & West): Eastern (Coromandel-Konkan), Western (Malabar-Konkan)
- Islands: Andaman & Nicobar (Bay of Bengal), Lakshadweep (Arabian Sea)
⚡ UPTET Exam Tip: Always remember India’s latitudinal extent is about 30° - this creates diversity in climate, vegetation, and agricultural patterns from Kashmir to Kanyakumari.
🟡 Standard — Regular Study (2d–2mo)
Standard content for students with a few days to months.
Physical Geography of India — Detailed Study Guide
The Himalayan Mountains
Three Parallel Ranges:
| Range | Altitude | Key Features |
|---|---|---|
| Himadri (Greater Himalayas) | 6,000-8,848m | Perpetual snow, highest peaks (Everest 8,848m, K2 8,611m in Pakistan) |
| Himachal (Lesser Himalayas) | 3,500-4,500m | Popular hill stations (Shimla, Mussoorie, Nainital) |
| Siwaliks (Outer Himalayas) | 600-1,500m | Youngest fold mountains, unconsolidated sediments |
Important Mountain Passes:
- Khardung La (Jammu & Kashmir) - 5,359m, highest motorable pass
- Rohtang Pass (Himachal Pradesh) - 3,978m
- Banihal Pass (Jammu & Kashmir) - 2,832m
- Zoji La (Jammu & Kashmir) - 3,528m
- Nathu La (Sikkim-China border) - 4,310m
Important Peaks:
- Mount Everest (8,848m) - Nepal/China border
- K2/Kangchenjunga (8,611m) - Pakistan/China border (K2 is in Karakoram)
- Kangchenjunga (8,586m) - Nepal/India (Sikkim)
- Nanda Devi (7,816m) - Uttarakhand (second highest in India)
⚡ Common Mistake: K2 is NOT in India - it’s in Pakistan-administered Gilgit-Baltistan. India’s second highest peak is Kangchenjunga (8,586m).
Major River Systems
Himalayan Rivers (Perennial):
-
Indus System:
- Source: Bokharchu glacier (Tibet) at 5,500m
- Length in India: 1,114 km
- Tributaries: Satluj, Beas, Ravi, Chenab, Jhelum
- Flows through: Ladakh, Pakistan, empties into Arabian Sea
-
Ganga System:
- Source: Gangotri glacier (Uttarakhand) - Bhagirathi and Alaknanda
- Main tributaries: Yamuna, Ghaghara, Gandak, Kosi
- Major cities: Haridwar, Kanpur, Allahabad, Varanasi, Kolkata (via Hooghly)
- Ferts: Indo-Gangetic Plain - most fertile alluvial soil
-
Brahmaputra System:
- Source: Kailash range (Tibet) - called Yarlung Tsangpo
- Enters India: Via Arunachal Pradesh (via Dihang river)
- Tributaries: Dibang, Lohit, Subansiri
- Known for: Majuli Island (largest river island - 880 sq km)
⚡ Important: Brahmaputra is shorter than Indus but has largest discharge due to heavy rainfall in Assam region.
Peninsular Rivers (Non-Perennial/Seasonal):
- East Flowing: Mahanadi, Godavari, Krishna, Cauvery (all into Bay of Bengal)
- West Flowing: Narmada, Tapti (into Arabian Sea)
- Drainage patterns: Dendritic, trellis, radial
⚡ UPTET PYQ: “The river known as ‘Sorrow of Bengal’ is: (a) Ganga (b) Damodar (c) Mahanadi (d) Hooghly” → Answer: (b) Damodar (known as Sorrow of Bengal due to floods)
The Great Plains of India
Indo-Gangetic-Brahmaputra Plain:
- Length: 3,200 km (Punjab to Assam)
- Width: 150-300 km (varies)
- Formed by: Alluvial deposits of Indus, Ganga, Brahmaputra rivers
- Age: 2.5 billion years old underlying, but recent alluvium (10,000 years)
Three Divisions:
| Region | Location | Soil Type | Features |
|---|---|---|---|
| Punjab Plain | Northwest | Sandy loam | Canal irrigation, Bhakra Nangal |
| Ganga Plain | Central | Alluvial (khadar/bhangar) | Dense population, intensive farming |
| Brahmaputra/G delta | East | New alluvium | Sundarbans, delta formation |
Bhabar and Terai:
- Bhabar: Pebbly deposit zone at foothills (10-15 km wide)
- Terai: Marshy, swampy zone south of Bhabar (groundwater recharges here)
- Bangar: Older alluvium, Kankar (lime nodules) present
- Khadar: Newer alluvium, flood-prone, more fertile
🔴 Extended — Deep Study (3mo+)
Comprehensive coverage for students on a longer study timeline.
Physical Geography of India — Complete Notes for UPTET
Peninsular Plateau
Two Major Divisions:
Central Highlands (North of Narmada):
- Malwa Plateau: Madhya Pradesh-Rajasthan border, Chambal-Rajput belt
- Bundelkhand: Uttar Pradesh-Madhya Pradesh border, granite hills
- Bhil Agency Area: Eastern Rajasthan
- Vindhya Range: Marks southern edge of Indo-Gangetic plain, 67 million years old
- Satpura Range: “Seven folded range”, Narmada-Tapti watershed
Deccan Plateau (South of Vindhyas):
- Maharashtra Plateau: Maharashtra-Madhya Pradesh, basaltic rock (trap), black cotton soil
- Karnataka Plateau: Karnataka-Telangana-Andhra Pradesh, granite, red soil
- Telangana Plateau: Eastern Deccan, Dhanbad mining area
- Chota Nagpur Plateau: Jharkhand-West Bengal-Odisha, richest mineral belt (coal, mica, iron, copper)
⚡ Important: The Deccan Plateau is a “peninsular” plateau - it’s the ancientstab of the Indian subcontinent, also called “Gondwanaland” (remember from geology).
Coastal Plains
Western Coastal Plain (Arabian Sea):
- Malabar Coast (Kerala): 140 km, lagoons (Kayamkulam, Ashtamudi), backwaters
- Konkan Coast (Maharashtra-Goa): 530 km, steep, harbor less
- Gujarat Coast: Rann of Kutch, marshy, salt flats
Eastern Coastal Plain (Bay of Bengal):
- Coromandel Coast (Tamil Nadu): 600 km, deltas prominent
- Utkal Coast (Odisha): Chilika Lake (largest lagoon in India)
- Krishna-Godavari Delta: Two major rivers, combined delta, Kaveri delta
Differences Between Coasts:
| Feature | Western Coast | Eastern Coast |
|---|---|---|
| Width | Narrower (50-100 km) | Broader (100-130 km) |
| Shape | Steep, linear | Gentle, deltaic |
| Ports | Mumbai, Marmagao, Cochin | Chennai, Kolkata, Visakhapatnam |
| Beaches | Less common | Marina Beach (Chennai) |
| Lagoons | Backwaters (Kerala) | Chilika, Pulicat |
Deserts and Islands
Thar Desert (Great Indian Desert):
- Location: Rajasthan, Gujarat, Haryana, Punjab
- Area: 4.42 lakh sq km (largest in India)
- Annual rainfall: Below 150 mm
- Features: Rolling sand dunes, saline lakes ( Sambhar Lake), desert vegetation
Ladakh Cold Desert:
- Location: Jammu & Kashmir (between Karakoram and Himalayas)
- Features: Cold desert, high altitude (3,000-5,000m), scanty rainfall (100 mm/year)
- Rivers: Indus, Shyok, Nubra
- Lakes: Pangong Tso (134 km long), Tso Moriri
⚡ Key for Exam: Thar is a HOT desert (tropical) while Ladakh is a COLD desert (temperate/cold). Don’t confuse them!
Andaman and Nicobar Islands:
- Bay of Bengal, 572 islands
- Area: 8,249 sq km
- Saddle Peak (Andaman) - highest point (738m)
- Barren Island - only active volcano in India
- Indira Point - southernmost point (6°N)
Lakshadweep Islands:
- Arabian Sea, 36 islands
- Area: 32 sq km (tiny compared to Andaman)
- Minicoy - southernmost, has 10m lighthouse
- Coral atolls, Lagoons
Climate and Monsoon
India’s Climate Types:
- Tropical Monsoon (Most of India): Southwest monsoon, June-September
- Tropical Savanna (South of Mumbai): Longer dry season
- Semi-Arid (Northwest India): Thar desert region
- Humid Subtropical (Northeast India): Heavy rainfall, Cherrapunji
- Mountain (Himalayas): Cold, snowfall in winter
- Dry Climate (Western Punjab): Winter rainfall from western disturbances
Monsoon Mechanism:
- ITCZ (Inter-Tropical Convergence Zone): 5°N to 15°N, shifts with sun
- Trade winds: Southeast trade winds cross equator, become Southwest monsoon
- Jet Stream: Sub-tropical westerly jet (120°N), affects rainfall onset
Southwest Monsoon (June-September):
- Onset: Kerala around June 1 (normal), advances northward
- Branches: Arabian Sea branch + Bay of Bengal branch
- Break monsoon: When monsoon trough shifts to Himalayas
- Retreat: October, withdrawal from northwest to southeast
Key Rainfall Patterns:
- Cherrapunji (Mawsynram): World record - 12,000+ mm annually (highest on Earth)
- Mawsynram: 11,872 mm annually
- Monsoon failure: El Niño years cause droughts
⚡ UPTET PYQ: “The ‘Mawsynram’ in Meghalaya receives the highest rainfall in the world. Its annual average rainfall is approximately: (a) 10,000 mm (b) 12,000 mm (c) 8,000 mm (d) 14,000 mm” → Answer: (b) 12,000 mm (approximately 11,872 mm)
Soil Types of India
| Soil Type | Color | Location | Features |
|---|---|---|---|
| Alluvial | Grey | Indo-Gangetic Plain | Most fertile, khadar/bangar |
| Black (Regur) | Black | Maharashtra, Madhya Pradesh | Cotton soil, self-ploughing |
| Red | Red | Tamil Nadu, Odisha | Ferrite content, less fertile |
| Laterite | Brown/Red | Kerala, Karnataka | Hard on drying, acidic |
| Desert | Sandy | Rajasthan, Gujarat | Low organic matter |
| Mountain | Brown | Himalayan region | Forest soil, acidic |
| Saline | White | Arid regions | High salt content |
⚡ Black soil (Regur): Contains iron, magnesium, alumina, lime. Ideal for cotton cultivation. Found in Maharashtra’s Deccan basalt region. Self-ploughing due to high moisture-retaining capacity.
Natural Vegetation
Forest Cover in India:
- Total geographical area: 3.29 crore hectares (22.21%)
- Dense forest: 8.06%
- Open forest: 9.39%
- Scrub: 4.76%
Types of Forests:
| Type | Location | Key Trees |
|---|---|---|
| Tropical Evergreen | Western Ghats, Assam, Andaman | Rubber, mahogany, ebony |
| Tropical Deciduous | Central India, Himalayan foothills | Teak, sal, bamboo |
| Thorny & Bush | Rajasthan, Gujarat | Acacia, cactus |
| Mangrove | Sundarbans, delta coasts | Sundari, gewa |
| Alpine | Himalayas (3,000-5,000m) | Pine, deodar, birch |
| Tundra | Ladakh, high altitudes | Moss, lichen |
Important Forest Areas:
- Sundarbans: Largest delta, mangrove forest, Royal Bengal Tiger
- Silent Valley: Kerala, tropical rainforest, no human interference
- Nagarhole: Karnataka, Bandipur: wildlife sanctuaries
Content adapted based on your selected roadmap duration. Switch tiers using the selector above.